Παραπομπή APA

William, D. T. (1962). Commerce (2nd ed.). Longmans.

Παραπομπή Chicago Style

William, D. Treharne. Commerce. 2nd ed. London: Longmans, 1962.

Παραπομπή MLA

William, D. Treharne. Commerce. 2nd ed. Longmans, 1962.